Merge branch 'composer' into 'master'

Add basic composer config.

See merge request !6

.gitignore

+vendor
+.phpunit.cache/
 settings.inc.php
-*~
 components
+*~
 cache/*
 meta/*
 meta/db.sqlite

composer.json

+{
+  "name": "uib/loadspeakr",
+  "description": "LODSPeaKr is a framework for creating Linked Data applications.",
+  "license": "Apache License",
+  "authors": [
+    {
+      "name": "Alvaro Graves",
+      "email": "alvaro@graves.cl"
+    }
+  ],
+  "require": {
+    "semsol/arc2": "^2",
+    "symfony/http-foundation": "^5.3"
+  },
+  "config": {
+    "sort-packages": true,
+    "platform": {
+      "php": "7.4"
+    }
+  },
+  "autoload": {
+    "psr-4": {
+      "uib\\ub\\loadspeakr\\": "classes/"
+    }
+  },
+  "require-dev": {
+    "roave/security-advisories": "dev-latest",
+    "phan/phan": "4.x",
+    "phpstan/phpstan": "^0.12.83",
+    "phpunit/phpunit": "^9"
+  }
+}